MET-23

Audio Transformers Overview

The MET-23 is a through-hole audio transformer manufactured by Tamura, designed for impedance matching in signal transmission circuits. It features a primary impedance of 1.6k ohms with a center tap and a secondary impedance of 3.2 ohms, resulting in a turns ratio of 22.4:1. The component operates within a frequency range of 300Hz to 100kHz. Key electrical specifications include a maximum DC current of 2.5mA, a power rating of 65mW, and an isolation voltage of 500Vrms. The device exhibits a primary DC resistance of 186 ohms and a secondary DC resistance of 0.8 ohms.

Audio Transformers Feature Summary

• Optimized for audio impedance matching applications
• Center-tapped primary winding configuration
• Through-hole mounting for reliable mechanical connection

Audio Transformers Applications

• Audio signal coupling
• Voice circuit interfacing
• Impedance transformation between high and low impedance stages

Audio Transformers Procurement Notes

Verify the specific ordering suffix to confirm pinout orientation and packaging variations, as these details are critical for PCB layout compatibility. Ensure that the selected variant meets the required isolation voltage standards for the target application environment. Cross-reference the manufacturer's latest datasheet to confirm compliance with current RoHS directives and material declarations before finalizing procurement orders.

Audio Transformers Selection Notes

Select this component when a precise 22.4:1 impedance transformation ratio is required between a 1.6k ohm source and a 3.2 ohm load. Consider the 300Hz lower frequency limit to ensure suitability for voice-band applications rather than full-range audio. Evaluate the 65mW power handling capability against the expected signal levels to prevent saturation or thermal issues during continuous operation.

Audio Transformers Part Context

The MET-23 belongs to Tamura's MET series of audio transformers, which are characterized by their optimized design for audio frequency ranges. This series provides various impedance ratios to accommodate different standard audio line impedances. The MET-23 specifically addresses the need for stepping down high-impedance signals to low-impedance loads, such as speakers or input stages, while maintaining signal integrity within the specified bandwidth.

Audio Transformers Replacement Considerations

Direct substitutes must match the 1.6kCT:3.2 impedance ratio and 22.4:1 turns ratio. Verify that alternative components support the same 300Hz-100kHz frequency range and through-hole package dimensions. Ensure equivalent isolation voltage ratings and DC resistance values to maintain circuit performance without modification.